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(No Model BROOK.

DRIVING BELT.

No. 870,238. Patented Sept. 20, 1887.

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UNITED STATES PATENT OFFICE.

FENELON B. BROOK, OF WASHINGTON, DISTRICT OF COLUMBIA, AS SIGNOB TO CHARLES A. SOHIEREN, OF BROOKLYN, NEW YORK.

DRIVING-BELT.

SPECIFICATION forming part of Letters Patent No. 370,238, dated September 20, 1887.

Application filed May 16, 1887. Serial No. 238,420.

To all whom it may concern.-

Be it known that I, FENELoN B. BROOK, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvementsin Link Driving-Belts; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

Figure 1 represents a plan view of a link driving-belt, partially broken away to show its construction, embodying my invention. Fig. 2 is a vertical cross-section of the same.

My invention relates to link driving-belts.

The improvement consistsin providing such a belt with a flexible breakjoint which adapts the belt for use on crown-pulleys.

In the drawings, A represents a link drivingbelt composed of a series of, preferably, leather links, 1, which are jointed together by pins or rivets. The central line of leather links, 2, forms the break-joint, which admits of the lateral flexure of the belt.

3 are a series of pins or rivets which extend from one side of the links 2 to the outer edge of the belt, and 4 are a similar series of pins or rivets extending from the opposite sides of the break-joint links 2 outwardly to the outer opposite edge of the belt.

5 are bolts or pins somewhat shorter than the pins 3 and 4, and which rivet together the links 1 on both sides of the break-joint links 2. The bolts 5 are arranged opposite and contiguous to the pins 3 and 4, but do not pass through the break-joint links 2.

The belt may be said to consist of two parallel sections of linked belting united at the center by a series of break-joint links, which (No model.)

allow a certain amount of flexibility laterally to the belt.

The breakjoint is torsionally flexible, as dis- 5 tinguished from all belts which have hinged leather joints. The appearance of the belt is the same as a straightiaced link'belt; but the rivets, not extending entirely through the belt, and being of varying lengths, admit of the desired lateral flexure to enable it to run perfectly upon crown or other similarly-faced pulleys.

The torsional break-joint shown and described enables the belt to be constructed more 5 compactly (and consequently increased effioiency in its frictional hold upon the pulley) than any other link driving-belt adapted for crown-pulleys ever constructed.

The link 2 maybe of varying thicknesses; or two or more links arranged side by side may be employed in forming the torsional breakjoints.

The breakjoints may be arranged other than at the center of the belt, and more than one 6 line of break-joints may be formed in the belt side by side at intervals, if deemed desirable.

I claim-- A driving-belt composed of parallel sections, each comprising a series of links immediately adjacent to each other the full width of the belt, and provided with one or more series of single connecting-links lying adjacent to the belt-sections, and a series of pins passed through the sections and through oppositeends of said connecting-links alternately from opposite sides thereof, substantially as set forth.

In testimony whereofI affix my signature in presence of two witnesses.

FENELON B. BROOK.

\Vitnesses:

W. T. JoHNsoN, A. W. JOHNSON. 

